AUGUST 4, 2026
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Case File

CVE-2023-6534

HIGH · CVSS 7.5 EPSS 0.74%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2023-12-13 · Last synced 2026-08-04

CyberRota Analysis

This is a high severity vulnerability with a CVSS score of 7.5. It may lead to a denial-of-service condition.

CVE
CVE-2023-6534
Severity
HIGH
CVSS
7.5
EPSS
0.74%

Original NVD Description

In versions of FreeBSD 14.0-RELEASE before 14-RELEASE-p2, FreeBSD 13.2-RELEASE before 13.2-RELEASE-p7 and FreeBSD 12.4-RELEASE before 12.4-RELEASE-p9, the pf(4) packet filter incorrectly validates TCP sequence numbers.  This could allow a malicious actor to execute a denial-of-service attack against hosts behind the firewall.

Related CVEs

Other vulnerabilities affecting the same vendor(s)